Surveying
The First Point of Aeries

All listed here
Is the point in the celestial sphere where zero meridian crosses the celestial equator
Is located near the very conspicuous rectangle of stars in the constellations of Pegasus and Andromeda
Is usually denoted by the Greek letter ?

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Surveying
Which of the following errors cannot be eliminated by taking both face observations ?

error due to non-parallelism of the axis of telescope level and line of collimation
index error i.e. error due to imperfect adjustment of the vertical circle vernier
error due to horizontal axis not being perpendicular to the vertical axis
None of these

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